Clamping device for building constructions.



I 0. P. TRIMBLE. I GLAMPING DEVICE FOR BUILDING GONSTRUGTIONS.

APPLICATION FILED APR. 22, 1910.

1,000,212, Patented Aug. 8,1911,

qivftni$sez dmgfgve n 'tar: (014% fi ww CQLUMBIA PLANOGRAPH 110.,WASHINGTON, D. c.

UNTT STATEg PAT FFTQ.

CLAMPING DEVICE FOR BUILDING CONSTRUCTIONS.

To all whom i 15 may concern:

Be it known that I, CHARLES P. TRIMBLE, a resident of Pittsburg, in thecounty of Allegheny and State of Pennsylvania, have invented a new anduseful Improvement in Clamping Devices for Building Constructions; and Ido hereby declare the following to be a full, clear, and exactdescription thereof.

My invention relates to a clamping device for building columns and otherlike constructions, and has special reference to such a device for usein concrete work.

The object of my invention is to provide a cheap, simple and eflicientclamping de vice for this class of work which is adjustable for use inconstructions of different shapes and sizes, will enable the rapid andeasy assembling and removal of the same, and will avoid the loss of timeand expense resulting from the separation or loss of the parts of thesame.

My invention consists, generally stated, in the novel arrangement,construction and combination of parts, as hereinafter more specificallyset forth and described and particularly pointed out in the claims.

To enable others skilled in the art to which my invention appertains toconstruct and use my invention, I will describe the same more fully,referring to the accompanying drawing, in which Figure 1 shows a sideelevation of a portion of a column form showing my improved clampapplied thereto. Fig. 2 is a cross-section of the same on the line 22Fig. 1, looking in the direction of the arrow. Fig. 3 is an enlargedside view partly in section of one of the clamps. Fig. 4 is an enlargedend view of the same. Fig. 5 is an enlarged cross-section on the line 55Fig. 3. Fig. 6 is a side elevation of the clamping and adjusting bolt.Fig. 7 is a crosssection of the column form showing another form of theclamping device.

Like symbols of reference herein indicate like parts in each of thefigures of the drawing.

As illustrated in the drawing, a represents the forms for forming asquare column, which are generally composed of a lagging of boards andset vertically to form the centering, and between which the concrete isfilled in to form the column. In this lagging the boards are setvertically and Specification of Letters I atent.

Application filed April 22, 1910.

Patented Aug. 8, 1911.

SerialNo. 557,066.

such lagging on each of its four sides is held together by battens Z)placed at suitable intervals, while each side of the centering is formedpreferably before erection by nailing the battens to such boards inorder to tie the latter together. The four sides of the centering formsa are held together by the angular clamps 1, each of which is at thecorner of such form and extend along the same, so that a bolt 2 can beconnected to and from clamp to clamp and thus form complete ties forinclosing such forms by thus being formed of four clamps and four bolts,while such a tie is shown at each batten Z) although it will beunderstood that only as many ties will be used, as required, and thatthe battens and ties will be spaced on the form as required according tothe size and design of the structure.

Each of the clamps 1 consists of an angle plate having the two sides 8,which are preferably of channel shape, and terminate in the flangedenlargements or lugs 4 at the ends of the same, while the channelflanges 5 extend from such enlargements and are preferably enlarged atthe corners of the plate, as at 6, to strengthen the same. ithin each ofthe enlarged ends 4 on the clamps 1 is the threaded hole 7 which extendslongitudinally of such ends and clamps, and the threads in one of saidend holes are formed in an opposite direction from those in the otherend hole in order to provide for the right and left hand screwconnection between each of the clamps, as hereinafter described.

The bolts 2 are each provided with a threaded portion 8 at each end ofthe same, with the threads of one end portion formed in an oppositedirection from those on the other end portion for the right and lefthand screw connection, by each of said bolts engaging with the threadedholes 7 in the enlarged ends 4 of opposite clamps 1 through saidthreaded portions 8. Preferably between the threaded portions 8 andcentrally of the bolts 2 is the enlarged portion 9, which is preferablyof nut shape, so as to provide for fiat sides thereon and is providedwith two holes 10 extending through the same at right angles to eachother.

The erection and removal of the centering shown in Figs. 1 and 2 isperformed as follows The four sides of the centering is formed by thelagging of the forms a being set in place against each other, as shownin Fig. 2, and secured together by the battens b, so that the sides ofthe centering are thus put in place, with the battens nailed together atthe corners to hold the centering in place until the ties formed by theclamping devices are applied, and the successive ties formed by theclamps 1 and bolts 2 of said devices applied. The four clamps 1 areconnected together in sets of two by a bolt 2 between each pair of thesame by their opposite ends 4, and on two of the four clamps in one setthe other two bolts are carried by one of the threaded portions 8thereon engaging with the threaded holes 7 in the enlarged ends 4: onthe same opposite from the ends 4 carrying the bolt between the same, sothat when the two connected clamps in the other set are placed aroundthe forms a and each of the clamps are applied at the corners of saidforms, the other threaded portions 8 on the bolts 2 of the unconnectedcla-mp ends 1 will engage with the holes 7 in the free ends 4 of theconnected clamps by being screwed into the same. After this is done allof the clamps 1 are tightened up against the forms a by screwing up thebolts 2 between the ends 4 on the same through a wrench applied to thenut portions 9 thereon or by a suitable instrument placed in the holes10 in said portions, as may be desired, to turn said bolts and therebyclamp and secure the centering. When the centering is to be removedafter the con crete for the column has been set, all that is required isto unscrew all the bolts 2 slightly to loosen the clamps, and thenunscrew one of the portions 8 on two of the opposite bolts 2 from theirclamping ends 4, so as to free or separate the clamps 1 from each other,which will allow all of the clamps to be freed from the forms a forremoval and with two of them connected together in two sets of two each.The two sets of two clamps each when so removed have each pair in a setconnected together by one of the bolts 2 between the ends 4: of thesame, while one of said sets has a bolt 2 connected by one of itsportions 8 within the opposite ends of its clamps, with the otherportion 8 extending out therefrom so that both sets are then ready to beconnected together for clamping, as above described, although if desiredeach of the two sets of clamps can be removed from the centering with abolt 2 connected between each of the clamps forming a set and from theopposite ends of the clamps.

In Fig. 2 the forms a; are for the formation of a square column, whilethe dotted lines indicate the formation of a round column, by forms ofthat shape, and around which corner pieces are placed for the clampingdevices. In Fig. 7, the forms 01 are for the formation of a hexagoncolumn by forms of that shape, and around which corner pieces are placedfor the clamping devices. If desired, as shown in Fig. 7, two ordinaryscrew bolts 2 can be used for connecting the flanged ends 4: of theclamps 1 together on opposite sides of the centering to permit of therapid coupling and uncoupling of the device, and at the same time enablethe other two bolts 2 between the clamps 1 to hold all the clampstogether when removed.

It will thus be seen that the bolts and clamps of my improved clampingdevice may be used in connection with the forming of large and smallcolumns and of various shapes, as well as for forming girders and othersuch forms in frame and other work and the device is convenientlyadjustable for any desired range of structural size, while it willenable cheap and convenient erection and removal of the centering orother framework and will involve no skilled labor in its application orremoval. It will also be seen that in the device, the clamps will carrythe bolts for the same, which will overcome the necessity of separatingthese parts in erecting or removing the centering, so that the loss oftime resulting from the separation and accidental misplacement of partsis thereby avoided, while the bolts of the device will enable theformation of the largest and smallest structures and will always be inline with each other thereby eliminating any tendency of the clamps fortipping. The device will also overcome the use of diii'erent size boltsfor different size forms, which will thereby prevent the ends of thebolts from being in the way, and so enable the same clamps and bolts tobe used for all structures.

Various modifications and changes in the design and construction of myimproved clamping device for building columns and other likeconstructions may be resorted to, without departing from the spirit ofthe invention or sacrificing any of its advantages.

l/Vhat I claim as my invention and desire to secure by Letters Patentis- 1. The combination with the centering forms, of a clamping deviceconsisting of angle clamps at the corners of such forms having the twosides of the same fitting against the sides of said forms, flanged endson each of the sides of said clamps ea'ch having a threaded hole withinthe flange, and a right and left hand threaded screw-bolt fitting inalined holes in the flanged ends of two of said clamps and between saidends for connecting the clamps together and for tightening the same.

2. The combination with the centering forms, of a clamping deviceconsisting of angle clamps at the corners of such forms having the twosides of the same fitting against the sides of said forms, flanged endson each of the sides of said clamps each having a threaded hole withinthe flange, and a right and left hand threaded screw-bolt fitting inalined holes in the flanged ends of two of said clamps and between saidends for connecting the clamps together and for tightening the same saidbolt having a wrenching portion thereon and between said flanged endsfor turning the same.

3. The combination with the centering forms, of a clamping deviceconsisting of angle clamps at the corners of such forms having the twosides of the same fitting against the sides of said forms, flanged endson each of the sides of said clamps each having a threaded hole withinthe flange and a right and left hand threaded screw-bolt fitting inalined holes in the flanged ends of two of said clamps and between saidends for connecting the clamps together and for tightening the same saidbolt having an enlarged flat-sided wrenching portion thereon and betweensaid flanged ends for turning the same.

t. The combination with the centering forms, of a clamping deviceconsisting of angle clamps at the corners of such forms having the twosides of the same fitting against the sides of said forms, flanged endson each of the sides of said clamps each having a threaded hole withinthe flange, and a right and left hand threaded screwbolt fitting inalined holes in the flanged ends of two of said clamps and between saidends for connecting the clamps together and for tightening the same,said bolt having holes through the same and between said flanged endsfor turning said bolt.

5. The combination with the centering forms, of a clamping deviceconsisting of angle clamps at the corners of such forms having the twosides of the same fitting against the sides of said forms, flanged endson each of the sides of said clamps each having a threaded hole withinthe flange, and a right and left hand threaded screwbolt fitting inalined holes in the flanged ends of two of said clamps and between saidends for connecting the clamps together and for tightening the same,said bolt having a wrenching portion thereon between said flanged endsand provided with holes through the same for turning said bolt.

6. The combination with the centering forms, of a clamping deviceconsisting of angle clamps at the corners of such forms having the twosides of the same fitting against the sides of said forms, flanged endson each of the sides of said clamps each having a threaded hole withinthe flange, and a right and left hand threaded screw-bolt fitting inalined holes in the flanged ends of two of said clamps and between saidends for connecting the clamps together and for tightening the same,said bolt having an enlarged flat-sided portion thereon between saidflanged ends and provided with holes through the same for turning saidbolt.

In testimony whereof, I, the said CHARLES P. TRIMBLE, have hereunto setmy hand.

CHARLES P. TRIMBLE.

\Vitnesses:

JAMES L. WEHN, T. B. HUMPHRIES.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner 'of Patents, Washington, I). G.

